102100302100221 has 16 divisors (see below), whose sum is σ = 138859338693120. Its totient is φ = 66711037638960.

The previous prime is 102100302100213. The next prime is 102100302100261. The reversal of 102100302100221 is 122001203001201.

It is not a de Polignac number, because 102100302100221 - 2³ = 102100302100213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102100302100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102100302100261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 871297705 + ... + 871414878.

It is an arithmetic number, because the mean of its divisors is an integer number (8678708668320).

Almost surely, 2^{102100302100221} is an apocalyptic number.

It is an amenable number.

102100302100221 is a deficient number, since it is larger than the sum of its proper divisors (36759036592899).

102100302100221 is a wasteful number, since it uses less digits than its factorization.

102100302100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1742712976.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 102100302100221 its reverse (122001203001201), we get a palindrome (224101505101422).

The spelling of 102100302100221 in words is "one hundred two trillion, one hundred billion, three hundred two million, one hundred thousand, two hundred twenty-one".